Pneumatic pumping or conveying device.



No. 770,153. PATENTED SEPT.13,1904..

W. J. BELL.

PNEUMATIC PUMPING OR CONVEYING DEVICE.

' APPLICATION FILED JUNE 7, 1901.

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WITNESSES ZNVENTUR fflzrh/ flair/J75 WMX M PATENTED SEPT. 13, 1904.

W. J. BELL.

PNEUMATIC PUMPING OR CONVEYING DEVICE.

APPLICATION FILED JUNE '7, 1901.

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NO MODEL.

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Patented September 13, 1904.

UNrrn STATES PATENT Orricn.

WVILLARD J. BELL, OF NEWAYGO, MICHIGAN.

PNEUMATIC PUMPING OR CONVEYING DEVICE.

SPECIFICATION forming part of Letters Patent No. 770,153, dated. September 13, 1904.

Application filed June 7, 1901. Serial No. 63,617. (N0 model.)

To Z7, whom, it may concern.-

Be it known thatLW'ILLARD J. BELL, a citizen of the United States, residing at Newaygo, in the countyof Newaygo and State of Michigan, have invented new and useful Improvements in Pneumatic Pumping or Conveying Devices, of which the following is a specification.

This invention relates to a certain new and useful pumping or conveying device for pumping and conveying liquids and semiliquid products, and especially adapted for pumping and conveying marl and clay mixed into what is generally known as slurry in the manufacture of cement from marl and clay and other analogous substances; and the invention consists in combining an air-compressor having suitable pipe connections and automatically-acting valves, with a pneumatic pump, substantially as herein described and claimed.

The objects of my invention are, first, to produce a pneumatic pump for the purpose described which will be eflicient and not liable to become injured by use and which will have the great advantage of being able to pump or convey a liquid or semiliquid gritty product without any of the working parts coming in contact with the product pumped or conveyed, and consequently saving a large part of the power required by other pumping systems and avoiding wear of working parts, and the further advantage of effecting a great saving in labor required to operate; second, to cheapen the method of pumping and conveying a fluid and semifluid material.

These objects I accomplish by means of the mechanism illustrated in the accompanying drawings, in which- Figure 1 shows a side elevation of my preferred form of pneumatic pump; and Fig. 2 shows a detailed View, on an enlarged scale, of the valve and operative mechanism. Fig. 3 is a view in elevation, partly in section, of the air-receiver and the pump and their valved connections.

Similar letters refer to similar parts throughout the several views.

A represents any suitable means for applying the power.

B represents a band wheel or pulley. On the shaft of the pulley B is a band-pulley, connected by a suitable belt to the pulley V, hereinafter described.

B is a duplex air-compressor of any suitable construction.

D is an air-receiver connected by the pipe C to the air-compressor B. The air-receiver D is connected to the pump F by means of the pipe E. The pump F is a closed vessel of any suitable form or shape and is provided with the inlet-pipe Gr, which receives the material to be pumped into the said pump F. The pump or vessel F is also provided with an outlet-pipe I, through which the material to any required position. The inlet-pipe Gr is provided with a valve H, which opens so.

as to allow the material to flow into the chamber F and which is closed automatically by the air-compressor which drives the material out 'of the chamber F.

J is an air-controlling valve in the pipe E, adapted to close at the time the escape-valve K is opened, as hereinafter described.

K is an escape-valve, preferably mounted on the pipe E.

L is a safety-valve which allows the escape of the air in the chamber D when the pressure becomes too great for safety to the chamber.

M is an ordinary pressure-gage.

V, which has been referred to heretofore, is a band-pulley mounted on a shaft, which shaft is also the shaft of the cone-pulley U.

U is a cone-pulley mounted on the same shaft as V-that is, the pulley V is preferably a cone-shaft pulley, although any form of pulley may be used without departing from the spirit of my invention. The pulley U is connected by a suitable belt to a cone-pulley on the same shaft as the pulley T, and the pulley T is connected by a suitable belt to the pulley S, the pulley B being rigid with the screw-gear R. with a thread which engages with the wheel Q. On the same shaft as the wheel Q, is a cam-wheel N. The revolution of this camwheel operates the free end of the rocker-arm The screw-gear R is provided exhaust through the pipe E as the pump or chamber F is filled with the product or material to be pumped through the'inlet-pipe Gr. I have described above my preferred form of construction; but it will be evident that variations may be made without departing from the spirit of my invention.

The operation of my invention is as follows: The air is compressed in the air-compressor B by any suitable means and isdriven through the pipe E into the pump or chamber F. The pressure of the air will close the valveH and drive the contents of the chamber F out through the pipe I, said pipe I being preferably provided with a valve H to prevent the backfiow of the material. The screw-gear R is setin motion by means of the mechanism already described, and as the cam passes the free end of the rocker-arm the rocker-arm dropsjat'hereby closingthe air-valve J and opening the air-valve K, allowing the air to exhaust from the pump or chamber F and. at the same time openingthe check-valve H, al-

lowing the pump' or chamber to be again filled withthe materi'al to be pumped. In this manner this pumping proceeds continuously, the pumping device acting automatically to fill and discharge the pump or chamber F, the timeoccupied in filling and discharging being governed by the speed of the cam -wheel, which speed may be varied by the use of conepulleys and also can be governed by the length of cam used.

The height or distance to which the material may be carried is limited only by the amount of power used andpressure obtained. As many pumps, cam-wheels, and controlling mechanism may be used as may be required by the points of delivery of the material, and if several pumpsare required they may all be operated from a single compressor; but the cam-wheels'should in such cases be keyed. to a common shaft in such position and relation to each other that all'the pumps will not draw on the compressor at the same timethat is, the work of the compressor should be equalized throughout the working cycle. The compressor and receiver should be centrally located, and the pumps placed Where most convenient'to receive the material to be operated upon.

Having thus described my invention, what I claim to have invented, and desire to secure by Letters Patent, is v 1. I The combination with the pump-chamber provided with an inlet-pipe and an outlet-pipe each provided with a check-valve, of an airreceiver, a pipe leading from the receiver to the pump-chamber, a valve in said pipe for controlling the passage of air from the receiver to the pump-chamber, avalve controlling an exhaust-port in said pipe between said first-named valve and the air-receiver, a rocker-arm pivoted at one end and connected to said valves so as to simultaneously open one and close the other, a cam arranged to oscillate said rocker-arm to actuate the valves, and means actuated, by the compressor-driving mechanism for operating the cam, substantially as described.

' 2. The combination ofapump-chamberhaving an inlet-pipe and an outlet-pipe, each provided with a check-valve, of an air-receiver, an air-compressor, a pipe leading from the receiver'to the pump-chamber, a valve in said pipe for controlling the passage of the compressed air from the receiver to the pump chamber, an exhaust-valve arranged in said pipe at a point between the said first-named valve and the pump-chamber, a rocker-arm connected to the stems of said valves, and a rotary cam actuated by the compressor-driving mechanism and operating to periodically rock the rocker-arm and simultaneously open one of said valves and close the other substantially as described. n

3. Thecombination withthe pump-chamber provided with an inlet-pipe and an outlet-pipe each provided with a check-valve, of an airreceiver, a pipe leading from the receiver to the pump-chamber, a valve in said pipe for controlling the passage of air from the receiver to the pump-chamber, a valve controlling an outlet-port in said pipe between said firstnamed valve and the air-receiver, a rockerarm pivoted at one end and connected to said valves so as to simultaneously open one and close the other, arotatable shaft, a wheel fixed on said shaft and arranged to support the free end of the rocker-shaft, a cam on the periphery of said wheel arranged to raise the rockerarm, a'gear-wheel fixed on the shaft, a worm in engagement with said gear wheel, and means actuated by the compressor -driving mechanism for rotating said worm to oscillate the rocker-arm periodically and operate the valves, substantially as described. I

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses. Z

WILLARD J. BELL. Witnesses:

B. T. BECKER, D. MoCooL.

IIO 

